FLOOD02376

• County: Statewide
• Basin: Statewide
• Title: CASFM Storming into the New Century
• Date: 8/30/2000
• Prepared For: State of Colorado
• Prepared By: CASFM
• Floodplain - Doc Type: Educational/Technical/Reference Information

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Design Procedure Form: Constructed Wetland Basin (CWB) - Sedimentation r-aclIllY
Sheet 1 of 3

Designer:

Company:

Date:
Project,

Location:

John Doe I, P.E.
CloseNufI Engineering, Inc.
August 30, 2000
Heavenly Views omce Park - PPD#3
Caslle Peaks, CO

1, Basin Storage Volume
la = 53.00 %
A) Tribulary Area's Imperviousness Ratio (I = 1,/100) i= )q;5$,'
B) Contributing Watershed Area (Area) Area = 120.00 acres
C) WSW ouality Capture Volume (WOCV) WoCV =/ 0:19 'Ii.watershed inches
(WoCV =0.9 . (0.91 '13-1.19'1'" 0.78'1))
D) Design Volume: Vol = ryvoCV / 12) . Area Vol= ";',1;93'. ,:,:: acre-feet
2. Wetland Pond Volume, Depth, and Water Surface Area
Calculated Reauired Minimums:
A) Minimum Permanent Pool: Vol_ ~ 0.75 . Vol Volpoal~ :"1;~' ::"::acre-feet
WS Area .........0;97.:...:, acres, estimated
Enter the Actual Desian Values:
VolpOl)l~ 1.50 acre-feet, final design
WS Area 1.10 acres, final design
B) Forebay (Volume ~ O.OS . Vol in 1 D) Volume= 0.10 acre-feet
Depth minimum = 2.5', maximum = 4.0' Depth= 3.00 feet
Area= P:033 ?:'~:acres, % = 3.03%
C) Outlet Pool (Area> 0.06 . Design WS Area) Depth= 3.00 feet
Depth minimum = 2.5', maximum::: 4.0' Area= 0.120 acres, % = 10.91%
D) Wetland Zones with Emergent Vegetation ( 6" to 12" deep) Depth= 1.00 feet
(Area = 50% to 70% of Design WS Area) Area= 0.600 acres, % = 54.55%
E) Free Water Surface Areas ( 2' to 4' deep) Depth= 3.50 feet
(Area = 30% to 50% of Design WS Area) Area= '...0,341. }' acres, % = 31.52%
100.00%
3 Average Side Slope Above Water Surface (4:1 or flatter) Z= 4.00
A) Depth of WoCV Surcharge (above permanent pool, 2' max.) 1:1 .;feet
4. Outlet Works
A) Outlet Type (Check One) x Orifice Plate
Perforated Riser Pipe
Other:
B) Depth at Outlet Above Lowest Perforation (H, 2' max.) H= .':.:'+.70 ".feet
C) Required Maximum Outlet Area per Row, (A.,) A., = '.::;:.:.;$;08"". \~square inches
D) Perforation Dimensions (Refer to Figure 5 in W.O. Sir. Del.):
(Enter 0,", only):
i) Circular Perforation Diameter OR 0= inches, OR
ii) Z' Height Rectangular Perforation Width W= 4.54 inches

UCD Feb 2000 BMP-CASFM Sem-Examples-97, eWB